Question

"Carbon can neither form C4+ cations nor C4 anions but from covalent
compounds'. Justify this statement. Also given reason why covalent
compounds are poor conductor of electricity?
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Answer 1

Answer:

Carbon is unable to form C4− anion as its nucleus with six protons will not be able to hold ten electrons. Thus, carbon achieves noble gas electronic configuration by sharing its four electrons with other elements, i.e. it forms covalent compounds.

Answer 2

Answer:

The atomic number of carbon is 6. It's electronic configuration is 2,4 so inorder to become stable it must either lose 4 electron or gain electron .It's is so hard for carbon to gain electron so it is not posible .

it is not possible for carbon to loose four electron as a lot of energy is required.